Contact stress analysis of the conforming post-cam mechanism in posterior-stabilized total knee arthroplasty

被引：27

作者：

Akasaki, Yukio ^{[1
]}

Matsuda, Shuichi ^{[1
]}

Shimoto, Takeshi ^{[2
]}

Miura, Hiromasa ^{[1
]}

Higaki, Hidehiko ^{[2
]}

Iwamoto, Yukihide ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Med Sci, Dept Orthopaed Surg, Higashi Ku, Fukuoka 8128582, Japan

[2] Kyushu Sangyo Univ, Dept Mech Engn, Fukuoka, Japan

来源：

JOURNAL OF ARTHROPLASTY | 2008年 / 23卷 / 05期

关键词：

post-cam; posterior-stabilized; conformity; contact stress; total knee arthroplasty; polyethylene;

D O I：

10.1016/j.arth.2007.05.023

中图分类号：

R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学（修复外科学）];

学科分类号：

摘要：

The present study evaluated the effects of extent of conformity of post-cam design on contact area and stress at post-cam mechanism using 4 different posterior-stabilized prostheses. TRAC and Alpina with full-confirmed post-cams exhibited the largest contact area at 90 degrees and 120 degrees. PFC sigma RPF with partial conformed post-cam had the largest contact area at 150 degrees. Scorpio NRG with less conformed post-cam had smaller contact area than the others. Lifting of femoral component decreased contact area and increased contact stress of TRAC and Alpina. Recent modifications of post-cam design have increased contact area, contributing to lower contact stress. None of these prostheses exhibited constant low contact stress throughout flexion. Further modifications of post-cam mechanism are necessary to provide lower contact stress throughout deep knee flexion.

引用

页码：736 / 743

页数：8

共 35 条

[1]

In vivo kinematic evaluation and design considerations related to high flexion in total knee arthroplasty [J].